Fbank douglas



@time .glatte @anni Letters Patent No. 75,670, datealilfarch 17 ,Y 1868.

minorenne In GLOBE-mime."

@te tlgebnle :stemt min ligne Enters atmfnni mating-part ai tg snm.

TO. ALL WHOM IT MAY CONC-EEN:

Be it known that I,- FnANx'DoUGLAs, of Norwich, in the county of New London, and Stato of Connecticut, have invented s new ond improved Globe-Valve; und I do hereby declare that the following is a. full. clear, and exact description ofthe annie, referencebeing had to the accompanying drawings, making a part of :his speci Vention, in which I `Figure lis o. vertical sectional drawing, representing the valve cut through the centre.

. Figure 2 is c view of lower yside of flexible ring. showing the hole in centre. Figure 3 isnn edge view of llcxible ring. Figure 4 is e sectioncl view of valve-seat. vFigurey 5 is n. view oi' valve raised from sent. Y Similar lettere of reference indicate corresponding parte or gnres.

The nature of my invention consists in a flexible or cxpansise valve or seat that will-tighten by the press- -ure of steam, water, gas, und other substances, or by the action of the valve-screw.

-To enable others skilled in the nrt to make und use nay-invention, I will proceed to describe its construction and operation. l

E is a valve-stem, on which is placed the rubber or flexible ring G, und also brass ring A, scid rings being held in their place by nut D. B is'the vulve-seat upon which ring A is ground to e sent. Under nut D, in ring A, nre little channels z' i, for the admission of steam or water. F is e scre\v-'velve,.upon which valve E turns freely. I y. 1

The operation is as follows: When the screw-stem F is turned down, ring A comes in contact with scatll, and forms n joint ns tight ns the ordinary metallic valve; but by a slight turn farther of screw FV, or a. pressure against ring A from upper portion of globe, (us inllicnted 4by the nrrow,) ring'A is forced up on sicz E away from nut 1*, causing exible ring C to expand tightly against seat B, und thereby making n.. perfectly tight l joint'. By menus of the little chnnnelsz' i in ring A, metallic rings in place ofthe flexible ring muy bemolle to Vulczrnito or hanlfrubher ring C, figs. 2 and 3, may he used for expand to njoint by the action of pressure.

am lient". In this valve we have all the advantages of the steam, as it becomes'sniiiciently oxible nmlerste ordinary metallic vulve, with the combined advantage oi" n flexible ring that is forced to a joint by theaction of the presslire, and the greaterthe pressure the more. perfect the joint. The exible ring may be applied to the sent B instead of valve E, and have the some atleet, v

I do not claim o. valve umile with e, rubber ring or disk enits underside imsnoh o. manner thnttlic action of th vulve-screw will press it down on e sent, and also' in such e mnnneixthat the action of steen: oriuereaseil pressure from under side of valve would tentl to 'compress said rubber-ring; force it anny from its sent, nml thereby make it leak, as thnt hns been patented; but

What I'ilo claim, and desire to secure by Letters Potent, is,- 1 l y l 1. The arrangement ol' the lcxhle ring C to form n valve, when compressed between ring Auml ring or vnlveE, in such a manner as to expand rif-)g C in diameter, to forni o. tight joint, substantially as specific-.1...4 2. The arrangement ofthe metallic ring A. with channels ia', for the purpose .herein specified.

l FRANK DOUGLAS.

Witnesses:

GEORGE C. SWEET, ALBERT S. Bonnes. 

